TY  - JOUR
AU  - Regnat, A.
AU  - Bauer, A.
AU  - Senyshyn, A.
AU  - Meven, M.
AU  - Hradil, K.
AU  - Jorba, P.
AU  - Nemkovski, K.
AU  - Pedersen, B.
AU  - Georgii, R.
AU  - Gottlieb-Schönmeyer, S.
AU  - Pfleiderer, C.
TI  - Canted antiferromagnetism in phase-pure CuMnSb
JO  - Physical review materials
VL  - 2
IS  - 5
SN  - 2475-9953
CY  - College Park, MD
PB  - APS
M1  - FZJ-2019-00341
SP  - 054413
PY  - 2018
AB  - We report the low-temperature properties of phase-pure single crystals of the half-Heusler compound CuMnSb grown by means of optical float zoning. The magnetization, specific heat, electrical resistivity, and Hall effect of our single crystals exhibit an antiferromagnetic transition at TN=55 K and a second anomaly at a temperature T∗≈34 K. Powder and single-crystal neutron diffraction establish an ordered magnetic moment of (3.9±0.1)μB/f.u., consistent with the effective moment inferred from the Curie-Weiss dependence of the susceptibility. Below TN, the Mn sublattice displays commensurate type-II antiferromagnetic order with propagation vectors and magnetic moments along ⟨111⟩ (magnetic space group R[I]3c). Surprisingly, below T∗, the moments tilt away from ⟨111⟩ by a finite angle δ≈11∘, forming a canted antiferromagnetic structure without uniform magnetization consistent with magnetic space group C[B]c. Our results establish that type-II antiferromagnetism is not the zero-temperature magnetic ground state of CuMnSb as may be expected of the face-centered cubic Mn sublattice.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000433044400001
DO  - DOI:10.1103/PhysRevMaterials.2.054413
UR  - https://juser.fz-juelich.de/record/859488
ER  -